This thesis examines how the kinetic properties of pair-produced Higgs bosons depend on whether the process is mediated by particles in the Standard Model or a simplified supersymmetric model. The analysis is based on simulated data made using MadGraph. The examination within this thesis is split into two parts, one performed on the output of MadGraph (parton level) and the second performed on the output of a simplified simulation of the ATLAS detector response (reconstruction level). The first part also contains a section showing that the supersymmetric model results are consistent with the Standard Model results in cases where no supersymmetric particles are present in the di-Higgs production and decay, and a section detailing the minor differences in kinematics of the Higgs bosons depending on the mass of the supersymmetric partner of the top quark. The second part of the thesis covers the decay of the Higgs boson into bottom and anti-bottom quarks, and includes a section showing that there is no difference if the decay is done using the MadSpin module or the Pythia module for MadGraph, before exploring the kinematics of the jets produced. Both when studying Higgs bosons at the parton level and when studying b-jets at the reconstruction level, it is found that there are clear differences in the kinematics between the Standard Model and the supersymmetric model. At both levels, a neural network has been designed, trained and tested. For the parton level neural network 59 % of all events are classified correctly, while at the reconstruction level 51 % of all events are classified correctly. These neural network results show that it is possible to train a neural network to learn on data like this, and that with enough di-Higgs events detected, their kinematic properties could be used to indirectly infer the presence of physics beyond the Standard Model.

京都大学 / 新制・課程博士 / 博士(理学) / 甲第23597号 / 理博第4759号 / 新制||理||1682(附属図書館) / 京都大学大学院理学研究科物理学・宇宙物理学専攻 / (主査)長野 邦浩, 教授 中家 剛, 准教授 吉岡 興一 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DFAM

The Large Hadron Collider (LHC) located at the European Organization for Nuclear Research (CERN) is the most powerful particle accelerator in the world in terms of collision energy and luminosity. This thesis presents a search for supersymmetric particles in proton-proton collision data recorded by the ATLAS experiment. A search for direct production of chargino and slepton pairs in a final state characterised by the presence of two leptons and missing transverse momentum is presented. This analysis is done using L = 20 fb-1 proton-proton collisions at √s = 8 TeV collected in 2012. No significant excess over background is observed. Exclusion limits at 95% confidence level on chargino, neutralino and slepton production are set. In 2011-12 the LHC was providing collisions every 50 ns. This puts very strong requirements on the energy measurement in presence of energy deposits from different collisions in the same read-out window and in the same calorimeter channel (pile-up). A quality factor computed offline for each collision and for each channel in the ATLAS Tile Calorimeter (TileCal) is studied. It is shown that the quality factor can be used to select channels that need a special treatment to account for large energy deposition from pile-up. Efficient criteria to detect pile-up in TileCal channels are proposed.

Proporciona los pasos y procedimientos para acceder al recurso Visible Body - Human Anatomy Atlas : guía aplicación móvil.

Doctor Educationis / Food security is a complicated phenomenon that consists of the intersections of food and people, and the cultures that people create around food. In general, food security research is concerned with how people access food, how reliable that access is, how affordable that food is, and how culturally appropriate that food is. This analysis tends to ignore the complex relationships people have with food and who these people are. Through the mapping of the Delft food system by remote sensing, surveys and interviews I create a food atlas that consists of maps of the spatiality of food but also maps of feelings, anxieties, fears and resilience, all centred around the people of Delft. The results and discussions of this thesis shows that food security is far more complicated than initially thought and that there are multiple avenues of inquiry into the lives of people who are considered food insecure. My research shows that the people of Delft are food insecure but that this label cannot be applied too liberally as food insecurity has different meanings for various residents and it manifests in various ways. I explore this through the creation of three women who represent three different classes of women who live within Delft.

A study of photon-jets and their identification variables computed in the electromagnetic calorimeter of an in-house, ATLAS-like, detector model developed at Uppsala University for full-simulations is presented. The signal, which is based on the Composite Higgs Model, considers the pair production of vector-like top quarks, denoted t', with the successive decays t' to S and a Standard Model top quark and S to two photons, where S is a new pseudo-scalar boson. For clustering purposes, Topological Clustering was implemented and compared against the already implemented Sliding Window clustering algorithm. A modification to the Topological Clustering algorithm used in the ATLAS detector was made and compared against the original version. The performance test showed a significant mass reconstruction improvement with Topological Clustering. Furthermore, the performance test showed some improvement with the modifications in the Topological Clustering for photons in a collimated scenario. The signal is compared to Standard Model background consisting of one photon plus zero, one or two jets, and isolated photons from the Higgs boson decaying into two photons. Even though some discrimination could be found, the analysis showed that standard cut and count strategy won't work and hence, further analysis with machine learning should be tested.

Despite making up over 80% of the matter in the universe, very little is known about dark matter. Its only well-established property is that it interacts gravitationally, but does not interact with ordinary matter through any of the other known forces. Specific details such as the number of dark matter particles, their quantum properties, and their interactions remain elusive and are only loosely constrained by experiments. In this dissertation I describe a novel search for a particular type of dark matter that couples preferentially to heavy quarks, using LHC proton-proton collisions at ATLAS. With a model-independent framework, comparisons are made to results obtained from other dark matter searches, and new limits are set on various interaction strengths.

The aim of this degree thesis is to create a brief summary of cartographic production for visually impaired people, to evaluate selected works and to create an Asthenopia School Atlas draft. Sample sheets showing an asthenopic map of Australia are included in the appendix of the degree thesis. The MicroStation application program was used for the atlas draft creation as well as for the creation of the Australia map sample sheets.

AN ABSTRACT FOR THE DISSERTATION OF STEPHEN JACK MCCASKEY, for the Doctor of Philosophy Degree in EDUCATION, presented on June, 2009, at Southern Illinois University Carbondale. TITLE: TEACHING STYLES AND LEARING STRATEGIES OF ILLINOIS SECONDARY CAREER AND TECHNICAL EDUCAITON TEACHERS MAJOR PROFESSORS: Dr. Marcia Anderson Dr. John Washburn The purpose of this study was to identify the teaching styles and learning strategy preferences of secondary CTE teachers in the state of Illinois. This study explored variables related to the teaching-learner transaction for teachers with varied educational backgrounds. Further, this study examined the relationship between teaching styles and several demographic variables and the relationship between learning strategies and several demographic variables for teachers in the CTE field. Participants involved in this study were members of the Illinois Association of Career and Technical Education (IACTE) at the time of the study. Demographic data revealed most respondents were female and age varied between 20 to 73 years with the highest percentage of responses being between the ages of 51-55. The majority of respondent ethnicity was White. The number of years teaching among respondents varied from 0 to 41 with the highest percentage having less than six years. The highest percentage of respondents held a Master's degree and the highest percentage in which the respondents most frequently teach is Technology Education/Industrial Education. The certificate type that most respondents hold is a Type 09 Standard. This study employed two standardized instruments and a questionnaire assessment to address four research questions. The Principles of Adult Learning Scales (PALS) was the first instrument used in this study and is designed to assist individuals in identifying their teaching style. Assessing the Learning Strategies of Adults (ATLAS) was the second instrument used in this study and is designed to quickly identify learning strategies. The online questionnaire was administered by placing the instruments on the Department of Workforce Education and Development's server at Southern Illinois University Carbondale. The majority of respondents in this study identified Problem Solvers as their preferred learning strategy followed by Navigators and Engagers. The respondents of this study represented an overwhelming commitment to the teacher-centered style. Based on the results of this study, the analyses of data were used to create a profile of the three preferences of the learning strategies for CTE secondary teachers. Additionally, the analyses of data from this study were used to create a profile of the two types of the teaching styles for CTE secondary teachers - Teacher-centered and Student-centered.

The Standard Model has been very successful over the last few decades in its agreement with experimental evidence; however there are some remaining puzzles in our understanding of the Universe which have yet to be solved. Even if the Higgs boson and Super Symmetry are discovered, questions still arise, such as why Nature is primarily made of matter when antimatter should have been produced in equal amounts at the beginning of the Universe, why the fundamental particles have the mass hierarchy that they do, what the nature of dark matter is, or whether or not quarks and leptons are themselves made of constituent parts, just to name a few. Theories Beyond the Standard Model attempt to tackle these questions, and also provide alternative explanations for electroweak symmetry breaking in case the Higgs mechanism in the Standard Model contradicts what is observed. The ATLAS detector was built to discover new physics from high-energy proton-proton collisions delivered by the Large Hadron Collider and to probe the electroweak scale with hard interactions at energies near ~1 TeV. While searching for new physics processes occurring at a much higher invariant mass than available at previous colliders, understanding the performance of the detector is crucial, especially during the first few months of running. This thesis presents a motivation for using dimuons to search for new physics in early ATLAS data, a measurement of the Z0/γ ->μμ cross section as a first test of Standard Model theoretical predictions at √s =7 TeVqqμμ, and finally a search for new physics via a four-fermion contact interaction in the dimuon channel (qqμμ) using the full 2010 data set.